Learn how to authenticate your API requests with SignatureAPI
X-API-Key
header.
When you make a request, SignatureAPI validates your API key and determines which account and environment (test or live) the request should access.
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Get your API key
X-API-Key
header with every request. Here’s how to authenticate when creating an envelope:
Key Type | Format | Purpose |
---|---|---|
Test keys | key_test_... | Development and testing without real legal consequences |
Live keys | key_live_... | Production use with legally-binding documents |
X-API-Key
header